The definition of mask is either draw the pixel or don't. Alpha blend mode uses the full 8 bits to blend the pixel so try:
SetBlend ALPHABLEND
to draw with alphablending instead.
SetBlend ALPHABLEND
to draw with alphablending instead.
The forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.